Euronews

Russian investigators are still searching for clues close to the shell of a bus that exploded in the Russian city of Volgograd on Monday.

The bus was allegedly attacked by a female suicide bomber in a hijab, killing six others and injuring about thirty people with a grenade.

A dash mounted camera showed the moment the explosion ripped through the bus. It’s the deadliest attack in the North Caucasus region for three years.

The suspect was named as 30 year old Naida Asiyalova. She’s thought to be the wife of Dmitry Sokolov, a man from Moscow who joined an insurgent group in Dagestan last year.

According to Russia’s main investigative agency Asiyalova was from Dagestan, one of the predominantly Muslim republics in the North Caucasus. Authorities showed a passport picture of her in a black chador – a full-body cloak worn by Muslim women.

Security drills have begun for the 2014 Winter Olympics next February in the Black Sea resort of Sochi not far from the bombing.

The incident is now likely to raise fears of further attacks by Islamic militants during the games.